Controlling chaos of topological defects arising at parametric excitation of surface capillary waves

It was revealed in experiments that characteristics of spatio-temporal chaos of defects arising at parametric excitation of surface capillary waves (Faraday ripples) in a vertically oscillating extended liquid layer can be controlled by periodic modulation of oscillation frequency. Controlling chaos is possible because frequency modulation changes trajectories of motion of individual defects and the character of pair interaction of defects. Numerical modeling of defect dynamics within the framework of a model of two coupled Ginzburg-Landau equations for parametrically excited surface capillary waves confirmed that defect velocity can be changed by changing external force frequency.